Get create field metadata for a project and issue type id

type Jira = {

  username: string;

  password: string;

  domain: string;

};

/**

 * Get create field metadata for a project and issue type id

 * Returns a page of field metadata for a specified project and issuetype id. Use the information to populate the requests in [ Create issue](#api-rest-api-2-issue-post) and [Create issues](#api-rest-api-2-issue-bulk-post).

This operation can be accessed anonymously.

**[Permissions](#permissions) required:** *Create issues* [project permission](https://confluence.atlassian.com/x/yodKLg) in the requested projects.

 */

export async function main(

  auth: Jira,

  projectIdOrKey: string,

  issueTypeId: string,

  startAt: string | undefined,

  maxResults: string | undefined

) {

  const url = new URL(

    `https://${auth.domain}.atlassian.net/rest/api/2/issue/createmeta/${projectIdOrKey}/issuetypes/${issueTypeId}`

  );

  for (const [k, v] of [

    ["startAt", startAt],

    ["maxResults", maxResults],

  ]) {

    if (v !== undefined && v !== "") {

      url.searchParams.append(k, v);

    }

  }

  const response = await fetch(url, {

    method: "GET",

    headers: {

      Authorization: "Basic " + btoa(`${auth.username}:${auth.password}`),

    },

    body: undefined,

  });

  if (!response.ok) {

    const text = await response.text();

    throw new Error(`${response.status} ${text}`);

  }

  return await response.json();

}